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RadioShack  Since 1921, makers have connected over the belief that fixing something is better than buying it new. We have the tools, parts & DIY guides you need.

Released in 1970, The Realistic Futura Hi-Fi speaker was an omnidirectional speaker which reflects sound downwards towards the base and outwards. The Futura could also be ceiling mounted and had a design with the future Jetsons in mind.

Here’s to all the mother’s out there helping their little makers live up to their dreams.

The Archer Road Patrol Radio (Cat. No. 12-197) is a bicycle handlebar mounted AM radio that featured a built-in horn, safety reflector, and also doubled as an indoor speaker. Only used 4 “C” sized batteries!

From cars and boats to surge protectors and Christmas lights, a jolt of lightning or a large spike in electricity can quickly damage your valuable electronics. Luckily, there is a very important fail-safe component called a fuse which can be found in most electronics that keeps your hardware from frying. But how does a fuse work?.
Fuses come in many different forms and grades ranging from a tiny microchip surface mount, to a large automotive glass fuse. Functionally all fuses have one simple purpose, and that’s to stop the flow of an electrical current. A fuse has a short length of wire that is designed to melt and separate in the event of excessive current, which is governed by the rated specification. Fuses are always connected in series with the component(s) to be protected from over current. This way,  when the fuse blows (opens) it will open the entire circuit and stop current from reaching any other component beyond the fuse in the circuit.

Released in the early 1970’s, the RadioShack TR-101 series featured dual VU (Volume unit) meters, a 7-inch 3-speed solid state stereo tape recorder, digital counters, and a built-in pre-amp for external speakers.

A light-emitting diode (LED) is a two-lead semiconductor light source that works in a single flow direction as the diode directs current from going in the reverse direction. LEDs use a PN-Type junction diode that emits light in the form of photons when energy is transferred through the Anode, which is the positive, long wire lead; and the Cathode, negative, short wire lead. LEDs can also be used in an AC current system by using a transformer to step-down and convert the flow of energy into a DC current.

The Archer Micro Space Patrol was a shortwave CB transceiver and operated on citizen band 14. It was one of the smallest CB AM radios ever built!

Speakers come in all shapes and sizes, enabling you to listen to music on your portable media player, enjoy a film at the cinema, or hear a friend’s voice over the phone. But how do they work?
In order to convert an electrical signal into sound, a speaker contains an electromagnet which is a metal coil that creates a magnetic field when an electric current flows through it. This coil behaves much like a normal magnet with one unique property: reversing the direction of the current in the coil flips the poles of the magnet.
Inside a speaker, an electromagnet is placed in front of a permanent magnet and is fixed firmly into position while the electromagnet is not. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. This in turn attracts and then repels the permanent magnet, vibrating back and forth. .
The electromagnet is usually attached to a cone made of a flexible material such as paper or plastic which amplifies these vibrations, pumping sound waves into the surrounding air and towards your ears.

The Realistic SCT-3 was released during the early 1970s. It featured independent channel control dials stereo volume output, perform voice recording, and even had dual VU meters for gauging sound levels!

A fiber-optic cable is made up of incredibly thin strands of glass or plastic known as optical fibers; one cable can have as few as two strands or as many as several hundred and each strand is less than a tenth as thick as a human hair. Fiber-optic cables carry information between two places using entirely optical (light-based) technology.
Light travels down a fiber-optic cable by bouncing repeatedly off the walls until it reaches the other end of the wire. Now you might expect a beam of light, traveling in a clear glass pipe, simply to leak out of the edges. But if light hits glass at a really shallow angle (less than 42 degrees), it reflects back in again as though the glass were really a mirror. The other thing that keeps light in the pipe is the structure of the cable, which is made up of three separate parts.
The main part of the cable—in the midde—is called the core which light travels through. Wrapped around the outside of the core is another layer of glass called the cladding. The cladding’s job is to keep the light signals inside the core. It can do this because it is made of a different type of glass to the core. The third layer is an insulation buffer or shielding layer that keeps the cladding from being tarnished or weathered. Some fiber optics wires may have additional layers for shielding.

State of the art! This 6 CD changer ad appeared in Rolling Stone magazine in September 1989.

Who would have thought?

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